Mine alarm instrument



June 5, i923.

- c. W. HURL INE ALARM INSTRUMENT Filed Dec. 6, 1921 I INVENTOR/ A TTORNE Y.

Patented June 5, i923.

UNITE. 3???? are CHARLES W. HUB/L, OF NANTY GLO, PENNSYLVANIA, ASSIGNOR TO MINER/S SUPPLY AND EQUIPMENT COMPANY, OF JOHNSTOWN, PENNSYLVANIA, A COMMON LAW 'rnusr ESTATE.

Application filed December 6, 1921.

a wall or roof, especially in mines and simi-.

, lar loeations,'an'd has for one of its objects to improve and simplify the construction and increase-the efliciency of devices of this character.

Another object of the invention is to provide a device of this character which is self contained and which can be readily transported with the mining tools and other portable objects or material employed in mining and like operations.

With these and other objects in view, the inventionconsists in certain novel features of construction as hereinafter pointed out in the claims, and in the drawings illustrative of the preferred embodiment of the inventi011,

Figure l is a side elevation of the improved device, viewed from one side.

Fig. 2is a similar view from theopposite side. a V

Fig. 3 is a transverse section taken on the line 3-3 of Fig. 2.

Fig. 4 is a transverse section taken on the line44 of Fig. 2.

i Fig. 5 is an enlarged detail illustrating the construction of the longitudinally adjustablestandard. 4

The improved device includes a standard formed of coacting portions 10 and 11, halved for portions of their lengths as shown at 12 and 14 with the portion 13 longitudinally slotted as shown at 14 and MINE ALARM INSTRUMENT.

Serial No. 520,245.

13 and extends around the plates 17 and 18 and theirflanges 19 and 20, as shown.

The standard portion 11 is provided with laterally directed leg members 22, to hold the improved device in vertical position.

ttached at 23 to the upper end of the standard portion 10 is a laterally extending curved arm 24 carrying a signal gong of approved construction and represented at 24, the gong device including a tapper for sending element therefor, as indicated at 26 and which extends from one side.

Pivoted at 27 to the member 10, preferably at the side opposite to the arm 24, is a bell crank lever including leg portions 28 and 29.

. The leg 28 is longer than the leg 29, and said leg 28 extends to a position whereby it will oppose the tapper or sounding element 26 of the gong. The leg 29 is directed vertically and has its upper portion threaded, as is indicated at 30.

A pressure operated member 31, substantially in the form of a turn buckle, has one end threaded for engagement with the.

tions 22 uponthe floor indicated at 33 and adjusts the standard members and the point or spur 32 against the roof, indicated at 34, until the terminal 35 of the leg 28 of the bell crank lever is relatively close to the tapper or sounding element 26.

In making these adjustments, a certain strain is applied to the device to hold it in position.

So long as the conditions are normal, the

device will remain in inoperative position and the gong kept from sounding.

' If the roof starts to sag or collapse, the arm 29 will be depressed and elevate the toe end 33 of the bell crank lever and actuate the tapper or sounding element and cause the gong to sound, thus notifying the miners that the roof is settling and giving secured to said arm, a bell crank lever piv What is claimed asn'ew is:--

them'time' to esc-apeand carry their tools and other objects-With them;

The device 1S simple in construction, certainin-aotion, and can be locatedKiller-ever devices of this character are required. U

The preilerred embodiment of the invention is disclosed in the drawings anl "forth in the specification, but it will be understood that any modificationswithin the zontal arm'of said-lever; and a vertically adjustable vpressure operated member car ried by the vertical arm of said lever and adapted When pressure 'is applied thereto to shift said '"lever causing the horizontal arm thereof to engage and operate said sounding element. 7

2. A device tor the purpose set forth com: prising a standard, a shiftable bell crank lever pivoted to said standard'and including a-vertical'and horizontal arm, a sounding element operated by and positioned in proximity tofl'the free terminal portion of the horizontal arm of said lever, and a pressure operated member carried by the vertical arm {of said lever and adapted When pressure is applied thereto to shift said lever causing thereby the horizontal armv thereof to engage-*and operate said 1 sounding element. I

A device for the purpose set forth comprising a standard, a laterally disposed arm carried thereby, a'sounding element oted to said'standard and'including a verhorizontally I Q proximity to and adapted when shifted t set tical and ahorizontally disposed arm, said disposed arm sufficient in actuate said sounding element, and a'pressure exerting member carried by the vertioal arm of said lever and adapted When pressure is applied thereto to shift said lever causing thereby the operation of the sounding element by the horizontal arm of the lever. I v

i. A device for the purpose setiorth comprising a standard, a laterally disposed arm carried thereby, a "sounding element secured to said aiiii,-a'bell orank lever? piv-p oted to said standard and inoludinga'vertical and a horizon-tallydisposed'arm; said horizontally proximity to and adaptedwhen shiftedto actuate said sounding element, a'pres'suref disposed arnr suiiioient' in i exerting member carried by the vertical arm of said lever and adaptedtvien pressure is applied thereto to shift said lever causing thereby the operation ot-the sound:

ing element by the horizontal arm o f the lever, and meansto provide fortheadjustor said pressureoperated element;

5. A device for thepurpose set, forth comprising a standard, a laterally dis posed arm carried thereby, a sounding ele ment secured to said arm, aibe'll crank-lever pivoted. to said standard and 'i-nclud-ing, a

vertical and a horizontally disposed-arm, said horizontally disposed arm; suilicient in proximity to" and adaptedjwhenshifted to actuate said sounding element aip-ressiire exerting member carried by the vertical arm of said-lever and adapted When'pji'es sure is applied thereto to, shiftsaid lever causing'thereby the operation or the sonnd ing element by' the"horizontalgarm or the lever, means to provide for the adjusting of said pressure operated elemenafand means to provide for adjdsJt'i-hgthelength of said standard In testimony whereof, I-faiiiXmy"signaQfture hereto.

I CHARLES W- 

